DryadLinqQueryable.Fork(T, R1, R2) Method (IQueryable(T), Expression(Func(IEnumerable(T), IEnumerable(ForkTuple(R1, R2)))))

DryadLinqQueryable Fork T, R1, R2 Method (IQueryable T , Expression Func IEnumerable T , IEnumerable ForkTuple R1, R2 )

DryadLINQ documentation

Forks a specified input dataset into two datasets. A specified user-defined function is applied to each partition of the input dataset to produce a sequence of ForkTuples.

Namespace: Microsoft.Research.DryadLinq
Assembly: Microsoft.Research.DryadLinq (in Microsoft.Research.DryadLinq.dll) Version: 0.1.2.0 (0.1.2.0)

Syntax

C++

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public static IMultiQueryable<R1, R2> Fork<T, R1, R2>(
	this IQueryable<T> source,
	Expression<Func<IEnumerable<T>, IEnumerable<ForkTuple<R1, R2>>>> mapper
)

public static IMultiQueryable<R1, R2> Fork<T, R1, R2>(
	this IQueryable<T> source,
	Expression<Func<IEnumerable<T>, IEnumerable<ForkTuple<R1, R2>>>> mapper
)

<ExtensionAttribute> 
Public Shared Function Fork(Of T, R1, R2) ( 
	source As IQueryable(Of T),
	mapper As Expression(Of Func(Of IEnumerable(Of T), IEnumerable(Of ForkTuple(Of R1, R2))))
) As IMultiQueryable(Of R1, R2)

<ExtensionAttribute> 
Public Shared Function Fork(Of T, R1, R2) ( 
	source As IQueryable(Of T),
	mapper As Expression(Of Func(Of IEnumerable(Of T), IEnumerable(Of ForkTuple(Of R1, R2))))
) As IMultiQueryable(Of R1, R2)

public:
[ExtensionAttribute]
generic<typename T, typename R1, typename R2>
static IMultiQueryable<R1, R2>^ Fork(
	IQueryable<T>^ source, 
	Expression<Func<IEnumerable<T>^, IEnumerable<ForkTuple<R1, R2>>^>^>^ mapper
)

public:
[ExtensionAttribute]
generic<typename T, typename R1, typename R2>
static IMultiQueryable<R1, R2>^ Fork(
	IQueryable<T>^ source, 
	Expression<Func<IEnumerable<T>^, IEnumerable<ForkTuple<R1, R2>>^>^>^ mapper
)

Parameters

source: Type: System.Linq IQueryable T
The input dataset

mapper: Type: System.Linq.Expressions Expression Func IEnumerable T , IEnumerable ForkTuple R1, R2
The function to apply to each partition of the input dataset

Type Parameters

T: The type of the elements of source
R1: The element type of the first output dataset
R2: The element type of the second output dataset

Return Value

Type: IMultiQueryable R1, R2
An IMultiQueryable exposing two output datasets

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IQueryable T . When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).